Ratchet-drill



(No Model.) 2 Sheets-Sheet 1. A. A. STROM.

RATUHET DRILL. No. 331,341. Patented Dec. 1, 1885.

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flu! fJ/f'm (No Model.) 2 Sheets-Sheet 2. A. A. STROM.

RATGHET DRILL.

No. 331,341. Patented Dec. 1,1885.

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AXEL A. STROM, OF CHICAGO, ILLINOIS.

RATC H ET=DRlLL.

SEECIFICATION forming part of Letters Patent No. 331,34rl, dated December 1, 1885. Application filed February 1], 1884. Serial No. 120,654. (No model.)

To all whom it may concern.-

Be it known that I, AXEL A. STROM, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Self-Feeding Ratchet-Drill, of which the following is a specification.

My invention relates to improvements in ratchet-drills, for whatever purpose used; but I have had more particularly in view the drilling of rails when laid upon the track and fast ened to the ties.

Figure 1 is a plan view of the entire machine; Fig. 2, a side view Fig. 3, an end View; Fig. 4, a section along the linear m,- Fig. 5, a plan view of the drill-stock; Fig. 6, an end view, same as Fig. 4; Fig. 7, a plan view of plate in handle covering ratchet; Fig. 8, a sectional view of ratchet, showing dogs and spring; Fig. 9, details of the automatic feed.

Similar letters refer to similar parts throughout the several views.

The frame A A A may be made of several pieces of metal fastened together but for greater strength I prefer to make it of one piece of bariron. It is so constructed as to pass over the rail and catch the rail at or near the center of the web, as shown in Fig. 2. The frame may be made of cast, wrought, or malleable iron, or steel. To the frame is welded or fastened the boss a. The handle or actuating-lever E terminates in a band embracing the drill-stock, as shown in the accompanying drawings. The band in which the actuating-lever terminates contains the plate Fig. 7 fastened in its place by screws or pins. In the plate Fig. 7 may be one or more slots, 6', to allow the dogs 9 to pass in when inserting the drill-stock. Inside the band which terminates the actuating-lever E is slipped the ratchet-wheel e, as shown in Fig. 8. Inserted in the drill-stock are one or more dogs, and back of each dog is a spring, 9. I have usually employed two dogs, with a single spring between, as shown in Fig. 8. The ratchetwheel 6 is fastened to the band terminating the handle with screws or pins through the holes h h, so as to be easily removable. The nut G, screwed upon the drill-stock, prevents it from slipping out of the band terminating the handle; or the feed-drum may be so constructed as to accomplish this object.

The automatic feed is accomplished by means of the following mechanism: Attached to the frame, by rivets or otherwise, is a device consisting of one or more jaws, b, a lever, B, and dog B, and pivoted to the lever B is a latch, b. The lever B and dog B are made in one piece,.which is hinged in the jaws b. The cog-wheel O is attached to the feed-screw c, which screws into afemale screw in the drillstock D. Upon the drill-stock is fastened the hollow cylinder or feed-drum D, which has one side out out in the manner shown in the drawings.

By the term drill-stock is comprehended the device for holding the head of an ordinary drill, and which passes through the band and terminates in a cylinder, on the inner side of which is cut the female screw, as above set forth.

The operation of the automatic feed is as follows: \Vhen the lever B is upon the unbroken surface of the feed-drum D, the dog B does not catch in the cog-wheel O, and the drill-stock D does not feed on the feedscrew 0; but when the lever B falls upon the side at of the feed-wheel, cut out as described, the dog B catches in the cog-wheel O, and the drill-stock feeds on the feed-screw-that is, in the first case both the drill-stock D and the feed-screw 0 turn together, while in the latter case the dog B holds the cog-wheel O, and with it the feedscrew a, stationary, and the drill-stock D, revolving upon the feed-screw c, is advanced toward the rail.

The design of the feed-drum D, in combination with the lever B, the dog B, and the cog-wheel 0, attached to the feed-screw c, is to cause the drill to be advanced toward the rail as rapidly as it is drilled away, and yet not so rapidly as to make the operation of the drill difficult, if not impossible, as would be the case were the feed continuous.

\Vhen the drill is first placed in position,the latch 12 is turned out, thereby causing the dog B to hold the cog-wheel O. This causes a continuous turning of the drill-stock upon the feed screw, and a continuous advancement of the drill toward or against the rail. WVhen the drill begins to bite the rail, the latch is thrown under the lever by the operator, and the action of theself-regulating automatic feed begins, as above set forth.

I am aware that the use of the ratchet-drill for the purpose of drilling rails is well known; but I do not know of any automatic or selffeeding ratchet-drill used for drilling rails, and in my invention the arrangement of the ratchet entirely protected from sand and gravel, and with the pins upon the drill-stock,and the ratchet arranged as described, so as to be easily removable, is, as I believe, new, as well as the application of an automatic or self feeding device to a ratchet track drill, and the frame passing over the rail and not requiring a wedge or lever to fasten or hold it.

What I claim as new, and desire to secure by Letters Patent, is as follows:

1. The frame A A A, made to pass over the rail and catch the rail at or near the center of the web, substantially as described.

2. The ratchet c, with one or more dogs g, spring 9 back of each dog, and the slots 6 e in the plate Fig. 7, to allow the dogs to pass in, all substantially as described.

3. The combination of the dog B, lever B, and latch b with the feed'wheel D, substantially as described.

4. The combination of the dog B and lever B with the feed-drum D, substantially as described.

5. The self-feeding device consisting of a lever, B, and dog B, a feed-drum, D, cogwheel 0, and feed-screw 0, attached to a ratchet-drill, substantially as described.

6. In combination with a ratchet-drill, the dog B, lever B, latch b, and feed-wheel D.

7 The combination,as described and shown, of the frame A, drill-stock D, and actuatinglever E,with the self-feeding device, substantially as described. 4

8. The combination,as described and shown, of the frame A, drill-stock D, and actuatinglever E,with the self-feeding device and the ratchet e, substantially as described.

9. The machine consisting of the frame A, boss a, jaws b, lever B, dog B, latch b, cogwheel 0, feed-screw c, drillstock D, feedwheel D, actuating-lever E, plate Fig. 7, ratchet 0, slots 6 6, dogs 9 9, spring 5/, and nut G, substantially as described.

AXEL A. STROM.

Witnesses:

A. HENRY MULLIKEN, A. G. PETTIBONE. 

